Perhaps you should try some spelling variations:
"sung thien cac snippets" » "rung thieng cac snippets", "luong thien cac snippets", "quang thien cac snippets", "sung hien cac snippets", "sung thien cau snippets", "sung thieu cac snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("sung thien cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sung thien cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
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